Immediately before the property value is set, before
calling its set access method

PostSet

Immediately after the property value is set

PreGet

Immediately before a property value query is serviced,
before calling its get access method

PostGet

Immediately after returning the property value to the
query

Tips

To remove a listener, delete the listener object returned by addlistener.
For example,

delete(lh)

calls the handle class delete method to delete the object from
the workspace and remove the listener.

Redefining or clearing the variable containing the
handle of the listener (for example, lh) does not
delete the listener. The event object (Hsource)
still has a reference to the event.listener object. addlistener ties
the listener's lifecycle to the object that is the source of the event.

To define a listener that is not tied to the event
object, use the event.listener constructor directly
to create the listener.

Name of the property whose property event triggers your listener,
specified as one of these values:

A scalar meta.property object

An array or a cell array of meta.property objects

A string or a cell array of strings, where each string
is the name of a property defined for the objects in Hsource

You can listen to property events on dynamic properties only
If Hsource is scalar. If Hsource is
non-scalar, then the properties must belong to the class of Hsource and
can not include dynamic properties (which are not part of the class
definition).

The class defining the source property must set the GetObservable and SetObservable property
attributes to enable you to listen to the property events.